I quit briefing after the first two weeks of law school. When I'm outlining, I just include 2-3 sentences about a case to jog my memory. Fact patterns weren't really important for any of my exams, so I didn't spend any time on that. Mine goes something like: "Bankrupt man gives $$$$ to mistress. No dice, because only sham consideration." Added maybe a quotable sentence from the reasoning.

Briefing after first year is probably a waste of time. By then you know what you are looking for in class, so you take better (and more efficient, more effective) class notes. Once you can efficiently book brief (doing the brief in the margins of your text), you can tailor your notes to the professors style of exam writing--some exams are very fact specific, like con law, while others are not. Listening is key.